Vacon apfiff09 marine, Applications Manual

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apfiff09 marine VACON®
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253
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Classified as Public
P2.13.27 to
P2.13.34 Fieldbus data IN selections 9 to 16 ID550-557
“FB Data InX Sel”
With these parameters, you can control any monitoring or parameter value from the
fieldbus. Enter the ID number of the item you wish to control for the value of these
parameters. Monitoring signals that can be controlled from fieldbus are shadowed.
Note that these parameters are visible only if a Fieldbus board with support for 16
process data variables is inserted in slots D or E. By default, these parameters are not
used.
P2.13.35 Fieldbus General Status Word ID ID897
“GSW ID”
With this parameter it is possible to select which data are sent in FBGeneralStatusWord
(see for details and availability in used fieldbus manual).
P2.13.36 FB Actual Speed ID1741
“FBActual
Speed
”
With this it is possible to select which Actual speed is shown on the fieldbus.
0 = Calculated
This selection shows what the ramp generator output is.
Open Loop
In frequency control mode when only the ramp output is shown on the fieldbus and,
therefore, the motor slip or any other changes of speed due to load changes are not
visible in the actual speed value. However, limiting functions are visible in the ramp
output.
Closed Loop
In closed loop control, the limiting functions take place after ramp generator. When
speed is limited by, for example, the motoring torque limit, the actual shaft speed may be
lower even if FB Actual Speed shows that speed is at reference.
1
= Actual
Open Loop
Motor speed is a calculated value (Monitoring variable Motor Speed) showing the load
effect on the speed and slip compensation.
Closed Loop
Motor speed is taken from the actual encoder signal showing the real speed all the time.